Broken views and the 'jogged' dimension

I’m curious as to when the jog or ‘squiggle’ symbol became acceptable for dimensioning across a break.

My old technical drawing textbook (pub.1986) showed no deviation from regular dimensioning for broken views. Alibre help calls this “Linear Foreshortened Dimensions”, and the jogged examples don’t really clarify things. I know that drafting standards change all the time, but is this a case of Solidworks does it so it must be right?

The online help for Solidworks broken views states that “Dimensions that cross the break lines are broken automatically” and shows the 'squiggles' in the following image:

I’m curious as to when the jog or ‘squiggle’ symbol became acceptable for dimensioning across a break.

My old technical drawing textbook (pub.1986) showed no deviation from regular dimensioning for broken views. Alibre help calls this “Linear Foreshortened Dimensions”, and the jogged examples don’t really clarify things. I know that drafting standards change all the time, but is this a case of Solidworks does it so it must be right?

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It is really hard to make the case that "SolidWorks does it so it must be tight."

The real question I am getting at is does this practice originate from the CAD industry? Unless you have seen a written standard mentioning it.

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As somebody who learned how to dimension Broken Views in the days of ruling pens on linen, the "technique" dates (based on Drawings I have seen) at least to WWII (and I suspect much further back in time). My 2nd edition of French's Engineering Drawing lays out a number of "rules that should be followed."

A quick check of ASME Y14.5M-2009 only mentions the "foreshortened" radius dimension and the linear dimension to indicate where the arc center is located. I suppose showing is break or foreshortening a linear dimension could be understood as preforming the same function.

As I recall from my Technical College days when we drew a broken view on the drafting board we used a line under the dimension text to indicate that was a "not to scale" dimension when it crossed the break. Of course I was in the last class to use drafting boards and only used them for the 1st year, the 2nd year was all AutoCAD and Cadkey.

So it’s probably a North American thing. Also my search led me to a S/W forum that says that the jogged dimension can only show up when they set things to "ANSI standard". Yet there seems to be no evidence of it in ASME standards (which took over from ANSI).

Paul -- Please remember that the American National Standards Institute was "decommissioned" in 2009. All "standards" for "Drawings" have been turned over to the American Society of Mechanical Engineers -- which means that nobody involved knows anything about Drafting (or Dimensionimg or Tolerancing -- far less conventional Drafting Practice!

I was a member of ASME from 1975 through 1988. I quit because they ha no idea what the ",PE" at the end of my name meant. They only sent mail to me addressed to "Mr. Lew PE." Subscriptions to their "Research Jounals" had more than tripled while the "content" had been reduced to a bad joke.

A quick check of ASME Y14.5M-2009 only mentions the "foreshortened" radius dimension and the linear dimension to indicate where the arc center is located. I suppose showing is break or foreshortening a linear dimension could be understood as preforming the same function.

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Harold,
Do you recall what standard you might have been referencing in this older post: